Process for the printing of cellulose fiber fabrics

Details Process for the printing of cellulose fiber fabrics Process for the printing of cellulose fiber fabrics

1978-09-07

1980-07-15

Griffin, Ronald W.

Bleaching and dyeing; fluid treatment and chemical modification

Process of printing permanently on substrate, other than...

Azo dye

8449, 8519, 8476, C09B 2700, D06P 102

Patent

active

042126487

ABSTRACT:
Process for printing textile cellulose fiber fabrics with printing pastes containing coupling components dissolved in an alkaline medium, sodium nitrite and diazotizable primary aromatic amines, in which process the amines are used as a solution or in the form of an aqueous fine dispersion with a particle size of less than 0.03 mm and are selected in a manner such that they are paractically non-volatile under at the drying temperatures and show a minimum basicity degree with the pK.sub.a being 2.2 or more, developing the water-insoluble azo dyestuffs on the fiber by diazotizing the amines and coupling the diazonium compound formed with the coupling components following the drying of the printing pastes applied by a treatment of the printed fabrics at room temperature with an aqueous developing bath containing formic acid, and completing the coupling without a previous intermediate drying of the fabric, however, optionally following an air passage, by a short-time steaming with saturated steam.

REFERENCES:
patent: 189371 (1877-04-01), Mather
patent: 2514410 (1950-07-01), Olpin et al.
patent: 3140914 (1964-07-01), Ward et al.
patent: 3597144 (1971-08-01), Leddy
patent: 3708257 (1973-01-01), Lowenfeld et al.
patent: 3713767 (1973-01-01), Lowenfeld et al.
patent: 3787179 (1974-01-01), Lowenfeld
patent: 3961887 (1976-06-01), Gronen et al.
patent: 4052157 (1977-10-01), Fuchs et al.
patent: 4094637 (1978-06-01), Feess et al.

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